Legos and Cereal: A no fly zone?

Looks like the tips that most parents get before getting on board with their child might just be the things that flight attendants hate most (legos? cereal?):

Think that because you’re on an airplane you’re off-duty as a parent. Stop expecting us to have spare diapers, formula, medicine, toys, playing cards, or batteries for DVD players or Game Boys. It’s an airplane, not a 7-11. Take your kid to the restroom before you board. Leave the dry cereal and Legos at home and bring snacks and toys for your kids that won’t make a horrible mess.